Machine for treating pulp.



H. B. SISTER.

MAGHINB FOR TREATING PULP.

APPLIUATIO FILED MAB.. 1, 1910.

Patented Nov. 15, 1910.

sis

. chute to the openingv i UTE- D srarns PATENT, oFFIoE.

To all whom itvmay' concern.:

lie it known that l, I-IALLvAnn Baarn/uanN Slis'rnn, a subject of the King of Norway,

.residing at Stavanger, Norway, have in ventedl certain new and useful Improvements in .Machines for Treating Pulp; and'I -do hereby ,declare the following to be a full, clear, and exact. description'of the inven-l tion, such as .will enable others skilled in the art to which it appertains to make and use the same, reference being had to the Vaccompanying drawings, and to letters or figures .p .of reference marked thereon, which formsa surface.

part of this specification.

My invention relates to machines for treating pulp and has for its object to provide a machine in which the sorting or straining of the pulp and thc refining of the same is performed continuously inA one machine, so that the pulp is repeatedly circulated throu rh the operating parts of the machine.

Referring to the drawing, which shows an Aexternal view of the machine with a sec-V tion through somuch of it as is neccessary to illustrate its function and organization, A designates the external casing of the strainer which may be `of any approved form preferably a so-called centrifugal strainer iaving a cylindrical straining plate B andv wings C which latter are connected with the shaft l), and throw Vthe )mlp and water on the inside of the strainer plate B, the pulp being fed to the wings from a hopper E. (')n the same shaft l) which carries the strainer wings or on a separate shaft is mounted the rotatable member lt` of a grinding mill the stationary member (i of Asaid mlll being mounted on the end wall ,il of the strainer. At. av-suitable point of said end wall, referably at its top al1-opening I is provi(l ed through which the coarse particles of the pulp may enter ashoot- K hauling to a central opening L in thestationzn'y member of the grinding mill.

The operation is as follows: lhe pulp in the strainer is thrown against the strainer plate and the fine particles pressed out. through the same in the usual way, the coarse pulp is pushed forward along the straining surface toward the end of Ithe strainer where the grinding mill or reiiner is placed and successively pressed out through the opening `I, falling down the L in the grinding mill, where the pulp is caught by the grinding the'fiow of the refine Spectilcatton ot Letters Patent. :["afented Nov' 15, 1910 Appuuanan mea march 1, 191e. serial No.

surfaces ofthe latter, these beingas shown preferably corrugated, so that`a large surafter having passed`\the grinding surfaces which mayhave `radial grooves, the pulp again enters the strainer either as shown behind the rotary member of "he grinder, .when the end wall H has a large central opening, or itis ledtthrough a suitable channel and return to the hopper It). In either case the pulp is again caught by the wings of the strainer and thrown on the straining M designates a spray ipe for facilitating dp pulp back to the strainer.

The reiiner lor grinding mill may be of any suitable type,l the one illustrated being only an examp e, the gist 'of the invention lying in the repeated automatic circulation ofthe pulp through the machine. In connection with the chute K and the opening L there may be arranged feed screws or wings causing a more rapid feeding Aof the pulp to the grindin surfaces.

The combined strainer and reliner may be arranged horizontally as shown or may be adapted for the Vertical type of apparatus. In both cases the pressure between the grinding surfaces must be adjustable for instance by suitable screws or by making the shaft longitudinally adjustable.

I claim:

l. The combination with a cylindrical strainer and means for throwing pulp against the same, of a reiiner, and means to feed the unstrained pulp to the reliner.

2. In combination with a strainer having a cylindrical straining surface and wings throwing pulp against the same of a reiiner means to feed the material not brought to pass through the strainer plate tothe reliner and means to feed the material treated by the reliner back to the strainer.

3. A combined strainer and reiincr having a common shaft carrying the wings of the strainer and the moving member of the refiner, the stationary member ofthe retiner vbeing mounted in the end wall of the strainer and a channel connecting the peripheral part ofthe interior of the strainer with the central part. of' thc reiiner, the peripheral part ofthe reiiner freely communieatingwith the interior of the strainer ture, a cy indrica riphery. v v

4. A machine for treatin pulp comprising a casin havin a latera dlscharge apercasing, beater blades revoluble within the screen, an annular-grinding memberI a r0- tary grindin member coperatn wlth the latter and a c ute to convey pulp ischar'ged screen mounted in-l thev Witnesses: e

4from the discharge aperture to the aperture 10 t in theannular grmdin member.

Intestimony that claimvthe foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

Immun) BERTRAND emma,

SARA HEGLAND, EMMA B. Tanon. 

